Comparing Diagnosis Accuracy of Indirect Digital Preapical Radiography (PSP) and Paper Print in Assessing External Resorption in Cervical Root Area

Abstract

Background and aim: Identifying exterior resorption of root can be challenging
particularly when no clinical symptoms are observed. This study compares accuracy of
indirect digital preapical radiography (PSP) and paper print in detecting exterior
resorption in cervical root area.
Methodology: This study was performed on 60 single-root premolar teeth. Cavities were
created by diamond circular milling machine with low speed and 1mm diameter. In this
paper, indirect digital preapical radiographies (PSP) were provided from teeth and then
they were printed by laser printer for radiography stereotypes and then they were printed
on silk paper for paper print and then they were studied by two observer in half-dark
room. Results were analyzed by SPSS software (22th version) through Kappa ,McNemar
and Spearman correlation tests.
Results: Generally, sensitivity and specifity were respectively 90% and 40/8% for digital
image and were 86/7% and 45% for paper print. There was no significant difference in
sensitivity, specify and accuracy of digital image and paper print (p≤0/05). Positive
predictive value and negative predictive value were 40/8% and 90% in digital image
respectively and they were 45% and 86/7% in paper print, compatibility of digital images
and reality was 0/308 and compatibility of paper print and reality was 0/317. There was
significant difference between digital image method and reality and paper print and reality
(p<0.001).
Conclusion: Generally, sensitivity and specificity of digital image was close to paper print.
However results obtained from digital image in different depth of artificial resorption were
different so that digital image had higher sensitivity and specificity in small resorption with
0/5mm depth.